Unlock instant, AI-driven research and patent intelligence for your innovation.

High-speed extrusion two-step silane cross-linked polyethylene insulation material for small-sized wires and its preparation method

A cross-linked polyethylene, high-speed extrusion technology, used in insulators, organic insulators, plastic/resin/wax insulators, etc., can solve problems such as shark skin distortion, melt fracture, and material resistance reduction, and achieve uniform mixing, Guaranteed stability and uniform dispersion

Active Publication Date: 2018-08-14
ANHUI CHUZHO DEWEI NEW MATERIAL
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method does not specifically optimize the fast traction required for high-speed extrusion of small-sized wires. Under high-speed traction, melt fracture and shark skin distortion will still occur. In theory, the material resistance will change after adding inorganic fillers such as calcium carbonate. Small and therefore not suitable for use in the manufacture of small gauge silane XLPE wires

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-speed extrusion two-step silane cross-linked polyethylene insulation material for small-sized wires and its preparation method
  • High-speed extrusion two-step silane cross-linked polyethylene insulation material for small-sized wires and its preparation method
  • High-speed extrusion two-step silane cross-linked polyethylene insulation material for small-sized wires and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This example provides a high-speed extrusion two-step method for the preparation of silane crosslinked polyethylene insulating material for small-sized electric wires. The raw materials and dosages used are shown in Table 1, wherein:

[0031] The easy-to-process polyethylene resin is Sumitomo Chemical's easy-to-process polyethylene grade: CU2002, the melt flow rate is 2.0g / 10min, and the density is 0.920g / cm 3 ; Low-density polyethylene is produced by Borealis. The grade of low-density polyethylene is: FB2230, the volume flow rate is 0.20g / 10min, and the density is 0.923g / cm 3 The first antioxidant is antioxidant 300; Lubricant is fluorine-containing rheological agent ppa; High-flow linear low-density polyethylene is the linear low-density polyethylene grade of Sinopec Zhenhai Refining and Chemical Production: 8320; Grafting initiator It is dicumyl peroxide; the silane crosslinking agent includes vinyltrimethoxysilane, vinyltriethoxysilane and vinyl-tri(2-methoxyethoxy)...

Embodiment 2

[0038]This example provides a high-speed extrusion two-step method for the preparation of silane crosslinked polyethylene insulating material for small-sized electric wires. The raw materials and dosages used are shown in Table 1. The raw materials other than easy-to-process polyethylene and silane crosslinking agent are all combined Example 1 is the same.

[0039] In this example, the selected easy-to-process polyethylene is Sumitomo Chemical's polyethylene, the grade is GT140, and the melt flow rate is 0.9g / 10min; the silane crosslinking agent is pure vinyltrimethoxysilane.

[0040] The preparation process of the high-speed extrusion two-step silane cross-linked polyethylene insulating material for small-gauge electric wires is the same as that in Example 1.

Embodiment 3

[0042] This embodiment provides a kind of preparation method of high-speed extrusion two-step silane crosslinked polyethylene insulating material for small-sized electric wires. See Table 1 for the raw materials and dosages used. The raw materials except the lubricant and grafting initiator are the same as those in Example 1. same.

[0043] In this example, the lubricant is compounded with fluorine-containing rheological agent PPA and microcrystalline wax in a weight ratio of 1:1, and the grafting initiator is 2,5-dimethyl-2,5-bis(tert-butyl peroxy base) hexane.

[0044] The preparation process of the high-speed extrusion two-step silane cross-linked polyethylene insulating material for small-gauge electric wires is the same as that in Example 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
melt flow indexaaaaaaaaaa
tensile strengthaaaaaaaaaa
melt flow indexaaaaaaaaaa
Login to View More

Abstract

The invention provides a high-speed extrusion two-step silane crosslinked polyethylene insulation material for a small-size electric wire. The insulation material is prepared from a silane grafting material component A and a catalyst masterbatch component B, wherein the silane grafting material component A is prepared from, by weight, 40-60 parts of easily-processed polyethylene, 10-30 parts of low-density polyethylene, 20-50 parts of high-flow linear low-density polyethylene, 1-4 parts of a silane crosslinking agent, 0.5-1.7 parts of a grafting initiator and 0.2-2.0 parts of a first antioxidant, and the catalyst masterbatch component B is prepared from, by weight, 50 parts of high-flow linear low-density polyethylene, 50 parts of low-flow linear low-density polyethylene, 1-10 parts of a first catalyst, 0.5-1.2 parts of a second catalyst, 1-10 parts of a lubricating agent, 1-6 parts of a second antioxidant and 1-10 parts of a third antioxidant. The insulation material has the superior high-speed extrusion process property and the smooth surface appearance and is suitable for manufacturing of the small-size electric wire, and no precipitate is retained at a machine head mouth mold during long-term extrusion.

Description

technical field [0001] The invention relates to the technical field of wire and cable materials, in particular to a high-speed extrusion two-step silane crosslinked polyethylene insulating material for small-sized wires and a preparation method thereof. Background technique [0002] Cross-linking modification is an important means to improve polyethylene heat resistance, weather resistance and other properties. The cross-linking methods of polyethylene can be mainly divided into three categories: peroxide cross-linking method, radiation cross-linking method and silane cross-linking method. The peroxide cross-linking method has high equipment cost, complicated process and is not suitable for making small-sized wires; the radiation cross-linking method has restrictions on thickness and requires irradiation after cable formation, with many procedures and high irradiation costs; silane The cross-linking method does not require special cross-linking equipment, and the process is...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L23/08C08K5/5425C08F255/02C08F230/08C08J3/22B29C47/92H01B3/44B29C48/92
CPCB29C48/92B29C2948/92704C08F255/02C08J3/226C08J2323/06C08J2423/08C08K2201/014C08L23/06C08L2203/202C08L2205/025C08L2205/035C08L2207/066C08L2312/08H01B3/441C08L23/0815C08K5/5425C08F230/08
Inventor 童晨张丽本何军栾珊珊
Owner ANHUI CHUZHO DEWEI NEW MATERIAL